Feb 12 10:39:16 growly kernel: [461319.696250] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
Feb 12 10:42:00 growly kernel: [461483.899795] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Down
Feb 12 10:42:03 growly kernel: [461486.595974] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
Feb 12 10:44:15 growly kernel: [461619.231315] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Down
Feb 12 10:44:18 growly kernel: [461621.843734] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
Feb 12 10:44:54 growly kernel: [461657.835257] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Down
Feb 12 10:44:57 growly kernel: [461660.607641] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
Feb 12 10:49:28 growly kernel: [461932.414818] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Down
Feb 12 10:49:31 growly kernel: [461935.063206] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
Feb 12 10:50:41 growly kernel: [462004.462892] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Down
Feb 12 10:50:43 growly kernel: [462007.115310] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
Feb 12 10:55:37 growly kernel: [462301.011013] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Down
Feb 12 10:55:40 growly kernel: [462303.643454] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
Feb 12 10:57:50 growly kernel: [462434.078965] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Down
Feb 12 10:57:53 growly kernel: [462436.683370] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
Feb 12 10:57:56 growly kernel: [462440.022947] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Down
Feb 12 10:57:59 growly kernel: [462442.655366] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
Feb 12 11:36:42 growly kernel: [464765.558511] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Down
Feb 12 11:36:44 growly kernel: [464768.198912] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
Feb 12 12:12:11 growly kernel: [466894.960387] igb 0000:05:00.0 enp5s0: igb: enp5s0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
[system was booted under windows during this period, then:]
Feb 12 16:31:34 growly kernel: [475030.953512] igb 0000:05:00.0 enp5s0: Reset adapter